1 files changed, 68 insertions, 0 deletions
diff --git a/Userland/DevTools/HackStudio/Debugger/DebuggerVariableJSObject.cpp b/Userland/DevTools/HackStudio/Debugger/DebuggerVariableJSObject.cpp
new file mode 100644
index 0000000000..ecf95de914
--- /dev/null
+++ b/Userland/DevTools/HackStudio/Debugger/DebuggerVariableJSObject.cpp
@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 2021, Matthew Olsson <matthewcolsson@gmail.com>
+ * Copyright (c) 2021, Hunter Salyer <thefalsehonesty@gmail.com>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include "DebuggerVariableJSObject.h"
+#include "Debugger.h"
+#include <LibJS/Runtime/Error.h>
+#include <LibJS/Runtime/GlobalObject.h>
+#include <LibJS/Runtime/PrimitiveString.h>
+#include <LibJS/Runtime/PropertyName.h>
+
+namespace HackStudio {
+
+DebuggerVariableJSObject* DebuggerVariableJSObject::create(DebuggerGlobalJSObject& global_object, const Debug::DebugInfo::VariableInfo& variable_info)
+{
+    return global_object.heap().allocate<DebuggerVariableJSObject>(global_object, variable_info, *global_object.object_prototype());
+}
+
+DebuggerVariableJSObject::DebuggerVariableJSObject(const Debug::DebugInfo::VariableInfo& variable_info, JS::Object& prototype)
+    : JS::Object(prototype)
+    , m_variable_info(variable_info)
+{
+}
+
+DebuggerVariableJSObject::~DebuggerVariableJSObject()
+{
+}
+
+bool DebuggerVariableJSObject::put(const JS::PropertyName& name, JS::Value value, JS::Value receiver)
+{
+    if (m_is_writing_properties)
+        return JS::Object::put(name, value, receiver);
+
+    if (!name.is_string()) {
+        vm().throw_exception<JS::TypeError>(global_object(), String::formatted("Invalid variable name {}", name.to_string()));
+        return false;
+    }
+
+    auto property_name = name.as_string();
+    auto it = m_variable_info.members.find_if([&](auto& variable) {
+        return variable->name == property_name;
+    });
+
+    if (it.is_end()) {
+        vm().throw_exception<JS::TypeError>(global_object(), String::formatted("Variable of type {} has no property {}", m_variable_info.type_name, property_name));
+        return false;
+    }
+
+    auto& member = **it;
+    auto new_value = debugger_object().js_to_debugger(value, member);
+    if (!new_value.has_value()) {
+        auto string_error = String::formatted("Cannot convert JS value {} to variable {} of type {}", value.to_string_without_side_effects(), name.as_string(), member.type_name);
+        vm().throw_exception<JS::TypeError>(global_object(), string_error);
+        return false;
+    }
+    Debugger::the().session()->poke((u32*)member.location_data.address, new_value.value());
+    return true;
+}
+
+DebuggerGlobalJSObject& DebuggerVariableJSObject::debugger_object() const
+{
+    return static_cast<DebuggerGlobalJSObject&>(global_object());
+}
+
+}